Assigned object tooltips are now displayed immediately after entering the entity's text
Database is now explicitly UTF8
Concurrency check added in Document Table

When you try to change document that just has been changed by someone
else, it throws a
[StaleObjectStateException](http://docs.jboss.org/hibernate/orm/4.3/javadocs/org/hibernate/StaleObjectStateException.html).
See the
[test](https://github.com/PreXident/TextAn/blob/master/Data/src/test/java/cz/cuni/mff/ufal/textan/data/test/ConcurrencyTest.java).
I thing that's enough for adding/updating documents co it fixes #19
You need to recreate database as described in #28
Context menu while editing objects does not display all aliases
Editing entities got new context menu
Merge remote-tracking branch 'remotes/origin/master' into db-hibernate2

Conflicts:
	Data/src/test/java/cz/cuni/mff/ufal/textan/data/test/ConcurrencyTest.java
Context menu for Entities is now displayed right under the last dragged word
Graph is now hackily centered to root object.
Enter in entities filter field now selects the entity if there is only one left
ObjectEdit got new context menu
WiP: adding objects
Improvements and fixes to adding new objects during pipeline
Changed web service's API, added saveService(WiP)
Selecting relation context menu now follows the same pattern as previous pipeline steps
Merge remote-tracking branch 'remotes/origin/server-impl' into client
Client and Server hopefully adapted for webservice changes.
Down arrow pressed in filter field switches to the list in context menu.
There are now only two list views in objects context menu
Added Back button to the pipeline
Added buttons for changing graph mode